Writing implement.



' A. H. GBANTHAM.

WRITING IMPLEMENT. APPLICATION FILED MAR.1"7,1910.

' Patented Dec. 27, 1910.

UNITED STATES PATENT orrron.

ALEXANDER HERBERT GRANTHAM, 0F DURIBAN, NATAL.

WRITING IMPLEMENT.

Specification of Letters Patent.

Patented Dec. 27-, 1910.

Application filed. March 17, 1910. Serial No. 549,980.

which the writing point consists of a ballmounted so as to rotate and incontact with the writing material in the interlor of the cap in which itis mounted. In accordance with the present invention, the Writing ballis mounted in contact with a second ball which is carried on a pillararranged in the center of the space within the cap and connected with adisk which bridges over the end of the reservoir and is perforated so asto permit the powdered writing material to pass from the reservoir intothe interior of the cap and come in contact with the two balls.

The invention will be further described with reference to theaccompanying drawings, in which,

Figure 1 is a longitudinal section through the complete writingimplement, while Fig. 2 shows a detail.

The body portion 10 of the implement forms a reservoir for the writingmaterial and is closed at one end by the block 1 which is preferablyremovable for the purpose of charging the, reservoir when required. Atthe other end, the reservoir carries a screw cap, 11 which holds thewriting ball 13 in position. This latter is mounted above a second ball14 which is carried in a cup shaped socket in the end of a pin 12attached to a disk 15 which is perforated as shown in Fig. 2. Theseperforations permit the passage of the powdered lead or other materialwhich by this means finds its way down between the two balls and colorsthe outer one which when in use rotates and applies the writing materialto the paper.

Reservoir writing implements having rotary ball points have beenpreviously proposed for use with writing material in liquid form and inthis connection it has been suggested that the writing ball be mountedon a number of other balls arranged within the end of the implement. Asdistinguishing from this proposed arrangement, it should be pointed outthat in the present case a single ball for supporting the writingball isemployed and this is carried on' a central support which allows amplespace within the end of the implement for the powdered writing materialto pass down to the contact surfaces of the balls. This arrangement alsohas the advantage as compared with the previously suggested device ofpermitting the use of a comparatively small writing ball instead of thelarge ball proposed in the earlier arrangement.

I declare that what I claim is 1. A writing implement comprising incombination a reservoir for powdered writing material, a writing head onthe outer end of said reservoir comprising a perforated member extendingacross the end of the res ervoir, a pin mounted on said member andhaving a socket in its outer end, a ball in said socket, a second ballin contact with said first ball and an adjustable perforated cap fittingover said second ball.

2. A writing implement comprising incombination a reservoir for powderedwriting material, a writing head on one end of said reservoir comprisinga perforated disk mounted on the end of the reservoir and a pinprojecting axially from said disk and having a socket in its outer end aball'in said socket, a second ball in contact with said first ball and aperforated cap attached to the endof the reservoir and fitting over saidsecond ball and holding it in position, said cap lying clear of the saidfirst ball.

In witness whereof, I have hereunto signed my name this 6 day of January1910, in the presence of two subscribing witnesses.

ALEXANDER HERBERT GRANTHAM.

Witnesses:

E. J. Fownn, HUGH S. HOOD.

